Successive partitioning technique and Feenberg perturbation theory
Osvaldo Goscinski, N. F. Stepanov · International Journal of Quantum Chemistry · 1970
Abstract Successive partitioning technique, when based on a modified bordering method for solving a system of linear equations and a relation for the inverse of a partitioned matrix leads to Feenberg's perturbation theory. This sheds light on the properties of the expansion, its bracketing properties and the nature of the “counting operators” used sometimes in this connection.